Spinning or twisting spindle



@d, 12, 1937. w c) ALDR|H 2,095,901

SPINNING OR TWISTING SPINDLE Filed May 24, 1934 INVENTOR.

Wwwa W ATTORNEYS.

Patented Oct. 12, 1937 PATENT OFFICE SPINNING R, TWISTING SPINDLEWilliam 0. Aldrich, Whitinsville, Mass, assignor to Whitin MachineWorks, Whitinsville, Mass, a corporation of Massachusetts ApplicationMay 24, 1934, Serial No. 727,309

3 Claims. (01. 308-152) This invention relates to spindles used inspinning or twisting frames. Conditions of operation for such spindleshave become very severe, due

to the demand for increased speed and increased length of bobbin, andalso to the use of lower grade bobbins which are less accurately checkedfor straightness and balance. Each of these changes in operatingconditions has increased the effect of any unbalanced load and hascorre- 10 spondingly increased the tendency of spindles to runoff-center and to chatter or vibrate at high speed.

It is the general object of my invention to provide an improved spindleconstruction embodying multiple friction discs effective to coact withthe spindle base to reduce or dampen vibration and to cause the spindleto run smoothly and without loss of power at any reasonable speed.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

A preferred form of the invention is shown in the drawing, in which Fig.1 is a sectional side elevation of my improved spindle;

Fig. 2 is a side elevation of the bolster and parts associatedtherewith;

Fig. 3 is a plan view of a locking ring;

Fig. 4 is an enlarged sectional elevation of the lower portion of thespindle base and associated parts;

Figs. 5 and 6 are sectional plan views, taken along the lines 55 and 6-6in Fig. 4 respectively, and

Fig. 7 is a partial side elevation of an alternative arrangement.

Referring to the drawing, I have shown my invention embodied in aspindle having a spindle base or bolster case It) adapted to be securedin a spindle rail l I by the usual binding nut l2.

A spindle blade I4 is provided with the usual driving whirl l5 and isrotatably mounted in bearings in a tube or bolster It. The spindle baseit is provided with a cylindrical opening ill to receive the bolster l6,and is also provided with an upwardly projecting boss I9 (Fig. 1)forming a step for the bottom of the bolster.

The upper end of the bolster is enlarged as 50- indicated at 20, andthis portion of the bolster is a loose sliding fit in the upper end ofthe recess I 8. A key 2| in the portion is received in a keyway orlongitudinally extending groove 22 (Fig. 1) in the side wall of theupper end of the recess I 8.

The blade M has the usual straight running bearing in the upper portionof the bolster l6 and also has a tapered step bearing in the bolster atits extreme lower end.

The lower portion 24 of the bolster is of substantially less diameterthan the recess I8 and is provided with a plurality of friction discs 35and with a plurality of rings 3!, the discs and rings being alternatelydisposed.

The friction discs 30 are of such dimensions that they have slightclearance in the recess "5 but have substantial clearance with respectto the portion 24 of the bolster It, as clearly shown in Fig; 6. Therings 35 on the other hand have slight clearance on the portion 24 ofthe bolster but have substantial clearance in the recess !8 of thespindle base ID, as clearly shown in Fig. 5.

The rings and discs are retained on the bolster by means of a lockingcollar 35 having a conical inner surface adapted to coact with a lockingring 36 which may be snapped into a circular groove 31 (Fig. l) formedin the lower end portion of the bolster.

A coil spring Ml encircles the portion 24 of the bolster above the discs36 and rings 3!, and the upper end of the spring 24 engages the enlargedupper end portion 2B of the bolster it, while the lower end'of thespring engages the upper ring 3 l In assembling the parts, the spring,rings, discs and collar are placed on the bolster and are forced upwardto a point which permits the locking ring 35 to be snapped into thegroove ti on the bolster.

Whenthe parts are released, the collar 35 is forced downward over thering 36 to a position of rest and all parts are thus securely retainedin the desired assembled relation. The spring Ml is of such dimensionsthat substantial axial pressure is applied to the rings 3! and frictiondiscs 30.

When a spindle thus constructed is placed in operation with anunbalanced load, it is found that the multiplicity of friction discs 30exert a strong dampening effect which reduces vibration or chatter ofthe spindle while at the same time permitting the spindle to pivot inthe usual manner about the enlarged portion 20 at. the upper end of thebolster and to select its own running position.

By the use of a plurality of friction discs and a plurality of rings, ithas been found that long bobbins, even if inaccurately balanced, can berun satisfactorily at substantially higher speeds than has beenhereto-fore possible.

In Fig. '7 I have shown an alternative arrangement in which the discsand rings are separately grouped. This arrangement provides lessrelatively movable contacting surfaces and thereby reduces the dampeningefiect which may be desired with only slightly unbalanced bobbins.

Having'thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:--

1. A spindle comprising a recessed spindle base, a spindle blade, abolster for said blade, means to hold said bolster from rotation in saidbase, said bolster having relatively slight clearance in the recess ofsaid base at its upper end and being substantially reduced at its lowerend, a plurality of friction discs slidably mounted on the reduced lowerend portion of said bolster and having slight clearance with respect tothe recessed spindle base but substantial clearance With respect to thebolster, a plurality of spacing rings alternating with said discs onsaid bolster and having slight clearance with respect to said bolsterand substantial clearance with respect to said recessed base, a collarsecured in fixed axial position on the, lower end of said bolster andbelow said discs and rings, means to hold saidcollar in fixed positionon said bolster, and a coil spring mounted on the upper part of thereduced portion of said bolster and having its upper end engaging ashoulder formed on the upper end of said bolster and having its lowerend engaging the uppermost of said discs and rings at the lower end ofsaid bolster, said spring being efiective to force said discs and ringsaxially downward into close frictional contact with each other andagainst said collar, and said rings being collectively movable againstfriction with said bolster transversely relative to said discs and saidspindle base by an unbalanced force applied to said spindle blade. 7

2. In a spinning machine, a tubular member, means at the lower end ofsaid tubularmember providing a bearing which is movable relative to saidtubular member, a blade having its lower end Within said tubular memberand rotatably supported on said bearing means, centralizing guidingmeans comprising a plurality of relatively movable superposed ringssurrounding said means, the outer peripheries of alternating ringsengaging the inner wall of said tubular member and their innerperipheries being spaced from said means, the inner peripheries of theother rings closely fitting about said means and their outer peripheriesbeing spaced from the inner wall of said tubular member, a fixedabutment interposed between the ends of said tubular member, and acoiled compression spring acting against said, abutment and said rings,said spring being operative yieldingly to restrain movement of saidbearing means relative to said tubular member. 3. In a spinning machine,a tubular member, a blade having its lower end disposed within saidtubular member, a floating bearing support for the lower end of saidblade, and means for centralizing and yieldingly restraining movement ofsaid bearing support relative to said tubular member, said meanscomprising a plurality of relatively movable superposed ringssurrounding said support, the outer peripheries of alternate ringsengaging the inner wall of said tubular member and their innerperipheries being spaced from said means, the inner peripheries of .theother rings closely fitting about said means and their outer peripheriesbeing spaced from the inner Wall of said tubular member, a fixedabutment interposed between the ends of said tubular member, and acoiled compression spring acting against said abutment and said rings,said spring being operative yieldingly to restrain movement of saidbearing means relative to said tubular member.

WILLIAM O. ALDRICH.

